define nitrogen...?????
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Nitrogen is a colourless element that has no smell and is usually found as a gas. It forms about 78% of the earth's atmosphere, and is found in all living things.
Nitrogen is also found in the nucleus of every living cell as one of the chemical components of DNA. In nature, most nitrogen is harvested from the atmosphere by microorganisms to form ammonia, nitrites, and nitrates that can be used by plants.
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Nitrogen is a nonmetalic element of group of the periodic table. It is a colourless, odourless, tasteless gas that is the most plentiful element in the Earth's surface and is a constituent of all living matter.
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